
the Minimum Spanning Tree (MST) [1]};

the Greedy Triangulation (GT), a maximally connected triangulation minimizing its total length [2]};

the Equitable Efficiency Model (EEM), a growth model adding one link at a time ensuring that such move constitutes the best improvement in the communication among any pair of nodes [3]};

the Gastner-Newman model (GN), a growth model where edges have an effective length which combines Euclidean and topological distances altogether [4]}.

